Abstract
Natural gas hydrates are considered as strategic resources with commercial potential in the 21st century. Obvious BSR characteristics will be shown on seismic profiles, if there exist natural gas hydrates. The AVO method is one of the methods which can be used to identify and forecast lithologic characteristics and fluid properties by using the relationship between Amplitude and Offset. AVO anomaly is one of the significant signs to check out whether or not there is free gas below the BSR, so it can be used to detect natural gas hydrates from the seismic profile. Considering the geological and geophysical characteristics of the Okinawa Trough and making use of the techniques mentioned above, we can conclude that the conditions there are favorable for the formation and concentration of natural gas hydrates. By analyzing the data collected from the study area, one can discover many different anomalous phenomena on the seismic profile which are related to the existence of natural gas hydrates. Preliminary estimation of the natural gas hydrates in the Okinawa Trough shows that the trough is rich in natural gas hydrates and may become a potential important resources exploration area.
Similar content being viewed by others
References
Careione, J. M., and Tinivella, U., 2000. Bottom simulating reflectors: seismic velocities and AVO effects. Geophysics, 65(1): 54–67.
Cui, S. G., Liu, H. S., and Tong, S. Y., 2003. The AVO characteristic research of natural gas hydrate in maritime space. Period. Ocean Univ. Chin., 33(s): 79–86.
Gong, J. M., 1999. Natural gas hydrate and its BSR. Ocean Geol. Dyn., 15(4): 4–6.
Holbrook, W. S., Hoskins, H., Wood, W. T., Stephen, R. A., and Lizarralde, D., 1996. Methane hydrate and free gas on the Blake Ridge from vertical seismic profiling. Science, 273(9): 1840–1843.
Hyndman, R. D., and Spence, G. D., 1992. A seismic study of methane hydrate marine bottom simulating reflectors. Geophys. Res., 97(B5): 6683–6698.
Kevenvolden, K. A., 1998. Methane hydrate-a major reservoir of carbon in the shallow geosphere. Chem. Geol., 71: 41–51.
Liu, H. S., and Zhou, Z. Y., 2002. Seismic data processing approaches for the study of gas hydrates in the East China Sea. J. Ocean Univ. Chin., 1(1): 87–89.
Liu, H. S., Zhou, Z. Y., Zhao, Y. X., and Tong, S. Y., 2001. The seismic characteristics research of natural gas hydrate in Okinawa Trough, East China Sea. Geoscience, 26(S): 11–16.
Niu, B. H., Wen, P. F., Wen, N., Fu, X., Sun, C. Y., Li, J., et al., 2004. The estimation methods of hydrate content based on BSR’s AVO forward model. Geophyscis, 49(1): 143–152.
Song, H. B., Matsubnyashi, O., Yang, S. X., Wu, N. Y., Jiang, W. W., Hao, T. Y., et al., 2002. Petrophysics model of sediment which contains natural gas hydrate and its BSR’s AVA characteristics. Geophysics, 45(4): 546–547.
Sun, C. Y., Zhang, M. Y., Niu, B. H., and Huang, X. W., 2003a. The AVO forward model research of BSR, which caused by natural gas hydrate. Mod. Geosci., 17(3): 337–344.
Sun, C. Y., Zhang, M. Y., Niu, B. H., and Huang, X. W., 2003b. The natural gas hydrate’s micro-models and its estimating method of velocity parameters. Geosci. Lead. Edge, 10(1): 192–193.
Tang, Y., Fang, Y. X., Gao, J. Y., and Li, J., 2005. The characteristics and resource content evaluation of natural gas hydrate in Okinawa Trough. Ocean. Geol. Quat. Geol., 25(4): 79–84.
Wang, X. J., Wu, S. G., and Xu, N., 2006. Determing the distributon model of hydrate and free gas occurrence in sediment with seismic attribute parameters. Oceanol. Limnol. Sin., 37(3): 271–279.
Wu, Z. Q., Chen, J. W., Gong, J. M., Xiao, G. L., and Wen, L., 2004. The application of AVO technique in hydrate exploration. Ocean. Geol. Dyn., 20(6): 31–35.
Xu, N., Wu, S. G., Wang, X. J., and Guo, J. H., 2006. Seismic study of the Gas hydrate in the continental slope of the Okinawa trough,east China sea. Prog. Geophys., 21(2): 564–571.
Yuan, A. G., Li, J. B., Chu, F. Y., and Li, X. Y., 2006. The AVO numerical simulation of natural gas hydrate formation. Geophysics, 49(6): 1826–1835.
Zhang, G. X., Huang, Y. Y., and Chen, B. Y., 2003. Seismology of the Natural Gas Hydrate in Maritime Space. The ocean press, Beijing, 3–147.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Liu, H., Huang, G., He, Y. et al. AVO character research of natural gas hydrates in the East China Sea. J. Ocean Univ. China 8, 270–276 (2009). https://doi.org/10.1007/s11802-009-0270-y
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11802-009-0270-y